| Citation: |
WU Kuan，WANG Zhaofeng，SHI Shiliang，et al. Experimental study of pressure measurement without sealing hole based on coal core in situ volume recovery[J]. Coal Science and Technology，2025，53（5）：186−195. DOI: 10.12438/cst.2024-0252
|
The non-sealing pressure measurement technology based on “state recovery” is a new experimental pressure measurement technology that compensates the gas loss, restores the coal core volume, and artificially simulates the coal reservoir temperature to restore the coal seam gas pressure under the original coal body occurrence state by transferring the gas pressure test coal sample from the original coal body occurrence state to the stripped coal sample and put it into the experimental coal sample tank. It is a feasible new technology to obtain the residual gas pressure of pre-pumped coal seam accurately and quickly, which is not limited by the location of downhole pressure measurement and the quality of hole sealing.The accurate recovery of the core volume is the key to the accurate determination of residual gas pressure in the pre-pumped coal seam by this method. In order to explore the appropriate coal core volume restoration method, relying on the no-seal coal seam gas pressure tester independently developed by the team, the coal core volume restoration experiment was carried out by loading axial compression coal core volume restoration, contact liquid injection (water/oil) coal core volume restoration, and the combination of pressure and liquid injection coal core volume restoration. The results showed that: When the loading axial pressure is set as 5, 10, 15……65 MPa in order to restore the coal core volume, due to the mutual support and resistance between the coal sample particles, the newly formed cracks caused by the sampling of broken coal body cannot be completely "healed", and it is difficult to restore the coal core volume by simply pressuring it in both theory and technology. Set the initial adsorption equilibrium pressure P0 to 0.31, 0.53, 0.74, 1.00 and 1.50 MPa for the coal core volume recovery test of contact water injection, contact silicone oil injection and compression/liquid injection combination. The experimental error of the coal core volume restoration method is 40.67%～116.13%. The experimental error of the coal core volume restoration method with contact silicone oil injection is 29.33%～87.10%, and the experimental error of the coal core volume restoration method with pressure/liquid injection is 2.67%～9.68%, and the error decreases with the increase of adsorption equilibrium pressure. Comparing the experimental results of three kinds of coal core volume restoration methods, it is finally determined that the combination of pressure in the upper cavity and injection of silicone oil in the lower cavity restores the coal core volume in situ. It provides a reliable way for the realization of non-sealed hole pressure measurement technology based on “state recovery”, provides a new method for coal mine to accurately and quickly obtain the residual gas pressure value of pre-pumped coal seam, and provides technical support for coal seam gas extraction effect inspection and extraction standard evaluation.
| [1] |
刘程,孙东玲,武文宾,等. 我国煤矿瓦斯灾害超前大区域精准防控技术体系及展望[J]. 煤田地质与勘探,2022,50(8):82−92. doi: 10.12363/issn.1001-1986.21.12.0869
LIU Cheng,SUN Dongling,WU Wenbin,et al. Analysis and prospect of precise prevention and control technical system ahead of large areas and time for gas disasters in China[J]. Coal Geology & Exploration,2022,50(8):82−92. doi: 10.12363/issn.1001-1986.21.12.0869
|
| [2] |
李延河. 地面井分区式瓦斯抽采技术体系及工程实践[J]. 煤炭科学技术,2023,51(3):100−108.
LI Yanhe. Surface well partition gas extraction technology system and engineering practice[J]. Coal Science and Technology,2023,51(3):100−108.
|
| [3] |
张占存. 压力恢复曲线测定煤层瓦斯赋存参数的试验研究[J]. 煤炭学报,2012,37(8):1310−1314.
ZHANG Zhancun. Experimental research on applying pressure build-up curves to determine the gas occurrence parameters of coal seam[J]. Journal of China Coal Society,2012,37(8):1310−1314.
|
| [4] |
刘三钧,薛志俊,林柏泉. 含水煤岩层瓦斯压力测定新技术[J]. 中国安全科学学报,2010,20(10):97−100. doi: 10.3969/j.issn.1003-3033.2010.10.018
LIU Sanjun,XUE Zhijun,LIN Baiquan. New technique of measuring gas pressure in coal and rock seam with water[J]. China Safety Science Journal,2010,20(10):97−100. doi: 10.3969/j.issn.1003-3033.2010.10.018
|
| [5] |
王浩,蒋承林,张建军. 煤层瓦斯压力测定中的钻孔注浆新技术研究[J]. 中国安全科学学报,2011,21(6):78−83. doi: 10.3969/j.issn.1003-3033.2011.06.013
WANG Hao,JIANG Chenglin,ZHANG Jianjun. Novel technology studies on drilling grouting in methane pressure measurement of coal seam[J]. China Safety Science Journal,2011,21(6):78−83. doi: 10.3969/j.issn.1003-3033.2011.06.013
|
| [6] |
许彦鹏,吴宽,李进. 穿含水层下向钻孔瓦斯压力测定技术研究[J]. 煤炭科学技术,2013,41(3):66−69.
XU Yanpeng,WU Kuan,LI Jin. Study on gas pressure measuring technology with downward borehole drilling through aquifer[J]. Coal Science and Technology,2013,41(3):66−69.
|
| [7] |
郭德涛,曹运兴,杜冬冬,等. 立井揭煤前测定煤层瓦斯压力的方法与实践[J]. 安全与环境学报,2017,17(2):496−501.
GUO Detao,CAO Yunxing,DU Dongdong,et al. Renovated reliable method for determining the coal seam gas pressure before exposure to the gassy coal seam in vertical shaft coal excavation[J]. Journal of Safety and Environment,2017,17(2):496−501.
|
| [8] |
谢和平,崔鹏飞,尚德磊,等. 深部煤层原位保压取心技术原理与瓦斯参数测定研究进展[J]. 煤田地质与勘探,2023,51(8):1−12. doi: 10.12363/issn.1001-1986.23.02.0075
XIE Heping,CUI Pengfei,SHANG Delei,et al. Research advances on the in-situ pressure-preserved coring and gas parameter determination for deep coal seams[J]. Coal Geology& Exploration,2023,51(8):1−12. doi: 10.12363/issn.1001-1986.23.02.0075
|
| [9] |
齐黎明,程根银,陈学习. 瓦斯压力测定时间及其受控因素分析[J]. 中国安全科学学报,2013,23(1):67−71.
QI Liming,CHENG Genyin,CHEN Xuexi. Analysis of gas pressure measurement time and controlling factors[J]. China Safety Science Journal,2013,23(1):67−71.
|
| [10] |
WANG H,WANG E Y,LI Z H,et al. Study and application of dynamic inversion model of coal seam gas pressure with drilling[J]. Fuel,2020,280:118653. doi: 10.1016/j.fuel.2020.118653
|
| [11] |
崔永杰,王兆丰,范道鹏. 免封孔煤层瓦斯压力测定技术可行性研究[J]. 煤矿安全,2021,52(11):22−27.
CUI Yongjie,WANG Zhaofeng,FAN Daopeng. Feasibility study on gas pressure measurement technology of coal seam without sealing hole[J]. Safety in Coal Mines,2021,52(11):22−27.
|
| [12] |
唐巨鹏,任凌冉,潘一山,等. 高地应力条件煤与瓦斯突出冲击力演化规律研究[J]. 煤炭科学技术,2023,51(8):116−128.
TANG Jupeng,REN Lingran,PAN Yishan,et al. Study on the impact force evolution law of coal and gas outburst under high ground stress[J]. Coal Science and Technology,2023,51(8):116−128.
|
| [13] |
张超,程仁辉,黄晓昇,等. 基于光纤光栅的煤层瓦斯钻孔塌孔位置表征试验研究[J]. 煤炭科学技术,2023,51(11):95−103. doi: 10.12438/cst.2023-0071
ZHANG Chao,CHENG Renhui,HUANG Xiaosheng,et al. Experimental study on hole collapse characterization of gas drainage holes in this coal seam based on fiber bragg grating[J]. Coal Scienceand T-echnology,2023,51(11):95−103. doi: 10.12438/cst.2023-0071
|
| [14] |
李树刚,刘李东,赵鹏翔,等. 倾斜厚煤层卸压瓦斯靶向区辨识及抽采关键技术[J]. 煤炭科学技术,2023,51(8):105−115.
LI Shugang,LIU Lidong,ZHAO Pengxiang,et al. Key technologies for extraction and identification of gas target area for pressure relief in inclined thick coal seam[J]. Coal Science and Technology,2023,51(8):105−115.
|
| [15] |
陈冬冬,张俭. 近水平顺煤层钻孔瓦斯压力测试技术研究[J]. 煤矿安全,2017,48(2):83−85.
CHEN Dongdong,ZHANG Jian. Study on testing technology of gas pressure in nearly level drilling along the seam[J]. Safety in Coal Mines,2017,48(2):83−85.
|
| [16] |
安丰华,程远平,吴冬梅,等. 基于瓦斯解吸特性推算煤层瓦斯压力的方法[J]. 采矿与安全工程学报,2011,28(1):81−85,89. doi: 10.3969/j.issn.1673-3363.2011.01.016
AN Fenghua,CHENG Yuanping,WU Dongmei,et al. Determination of coal gas pressure based on characteristics of gas desorption[J]. Journal of Mining & Safety Engineering,2011,28(1):81−85,89. doi: 10.3969/j.issn.1673-3363.2011.01.016
|
| [17] |
镡志伟,程五一,牛聚粉,等. 利用钻屑解吸法测定煤层瓦斯压力的应用[J]. 华北科技学院学报,2006,3(1):17−19. doi: 10.3969/j.issn.1672-7169.2006.01.005
TAN Zhiwei,CHENG Wuyi,NIU Jufen,et al. Determinating methane pressure in coal seam application with the method of desorption of drill-cuttings[J]. Journal of North China Institute of Science and Technology,2006,3(1):17−19. doi: 10.3969/j.issn.1672-7169.2006.01.005
|
| [18] |
贺建明,王宏图,鲜学福,等. 煤层温度和应力梯度变化对煤层瓦斯压力计算的影响[J]. 重庆大学学报(自然科学版),1999,22(5):95−98.
HE Jianming,WANG Hongtu,XIAN Xuefu,et al. The Influence of In-situ stress gradient and geothermal temperature on the calculation of coalbed gas pressure[J]. Journal of Chongqing University(Natural Science Edition),1999,22(5):95−98.
|
| [19] |
许江,鲜学福. 煤层中瓦斯压力的理论计算方法[J]. 重庆大学学报(自然科学版),2000(S1):15−17.
XU Jiang,XIAN Xuefu. Theoretic computing methods about the gas pressure in coal seam[J]. Journal of Chongqing University (Natural Science Edition),2000(S1):15−17.
|
| [20] |
王宏图,鲜学福,尹光志,等. 煤矿深部开采瓦斯压力计算的解析算法[J]. 煤炭学报,1999,24(3):279−283. doi: 10.3321/j.issn:0253-9993.1999.03.012
WANG Hongtu,XIAN Xuefu,YIN Guangzhi. Inversitigation of Analytical method for coalbed gas pressure in high temperature and deeply mining mines[J]. Journal of China Coal Society,1999,24(3):279−283. doi: 10.3321/j.issn:0253-9993.1999.03.012
|
| [21] |
高明忠,宋杰,崔鹏飞,等. 深部煤层原位保压保瓦斯取心技术装备及初步应用[J]. 煤炭科学技术,2024,52(4):143−154. doi: 10.12438/cst.2024-0156
GAO Mingzhong,SONG Jie,CUI Pengfei,et al. Technology and application of in-situ pressure andgas maintaining coring for deep coal seam[J]. Coal Science and Technology,2024,52(4):143−154. doi: 10.12438/cst.2024-0156
|
| [22] |
郑梦浩,魏世义,董家昕,等. 一种基于钻孔采样实测的煤层瓦斯压力测试系统[P]. CN210347634U,2020-04-17.
|
| [23] |
陈向军,程远平. 注水对煤层吸附瓦斯解吸影响的试验研究[J]. 煤炭科学技术,2014,42(6):96−99.
CHEN Xiangjun,CHENG Yuanping. Experiment study on water injection affected to desorption of coal adsorption gas[J]. Coal Science and Technology,2014,42(6):96−99.
|
| [24] |
陈金生,王兆丰,樊亚庆. 水分自然侵入促进含瓦斯煤解吸效应实验研究[J]. 中国安全生产科学技术,2016,12(4):76−80.
CHEN Jinsheng,WANG Zhaofeng,FAN Yaqing. Experimental study on desorption promoting effect of coal containing gas by water natural invasion[J]. Journal of Safety Science and Technology,2016,12(4):76−80.
|
| [25] |
陈金生,王兆丰,岳基伟,等. 水分润湿过程中煤中瓦斯解吸规律试验[J]. 安全与环境学报,2017,17(4):1309−1313.
CHEN Jinsheng,WANG Zhaofeng,YUE Jiwei,et al. Experimental study for the coal gas desorption regularity in the process of moistening[J]. Journal of Safety and Environment,2017,17(4):1309−1313.
|
| [26] |
CHEN X J,CHENG Y P. Influence of the injected water on gas outburst disasters in coal mine[J]. Natural Hazards,2015,76(2):1093−1109. doi: 10.1007/s11069-014-1535-3
|
| [27] |
郑超,马东民,陈跃,等. 水分对煤层气吸附/解吸微观作用研究进展[J]. 煤炭科学技术,2023,51(2):256−268.
ZHENG Chao,MA Dongmin,CHEN Yue,et al. Research progress micro effect of water on coalbed methane adsorption/desorption[J]. Coal Science and Technology,2023,51(2):256−268.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: