摘要
为获得真实可靠的现场实测煤层瓦斯压力,实现煤层突出灾害等级科学评价和精准防治,通过理论分析、数值模拟和现场验证相结合的方法,以双重孔隙介质为基础,根据煤层瓦斯流动模型和瓦斯压力恢复曲线,分析煤层瓦斯压力测定的时空分布及准确性,并以桃园煤矿Ⅱ1采区10煤层为例,开展工程验证。研究结果表明:当基质瓦斯压力与裂隙瓦斯压力处于动态平衡时,所测得的煤层瓦斯压力最为准确;所构建的用于COMSOL解算的煤层测压瓦斯流动方程,可实现瓦斯压力时空分布的准确模拟;当煤层实测瓦斯压力恢复曲线与模拟分布特征一致且处于工程预测值范围内,可以判定结果为真实值;现场工程验证了实测瓦斯压力恢复曲线与模拟结果一致,测压结果准确。
In order to obtain reliable field measured results of coal seam gas pressure and realize scientific evaluation and precise prevention for coal seam outburst disasters,theoretical analysis,numerical simulation and field test were utilized to analyze spatial and temporal distribution of measure gas pressure based on gas flow model and gas pressure recovery curve with dual pore medium as object.Then engineering verification was carried out in No.10 coal seam in Taoyuan coalmineⅡ1 mining area.The results show that when matrix gas pressure and fracture gas pressure are in a dynamic balance,the measured results are the closest to real value.Accurate simulation of gas pressure spatial and temporal distribution could be realized by using gas flow equation of coal seam pressure measurement with COMSOL.When measured gas pressure recovery curve is consistent with simulated distribution regulation,and falls within engineering range of predictive values,it could be considered as real value.So the field measurement is accurate as it shows the recovery curve’s consistency with simulated results.
作者
王亮
孙毅民
褚鹏
赵伟
邹双英
WANG Liang;SUN Yimin;CHU Peng;ZHAO Wei;ZOU Shuangying(School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Key Laboratory of coal mine gas and fire prevention Ministry of Education,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Shandong Coalfield Geology Bureau,Tengzhou Shandong 277500,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2021年第2期40-47,共8页
China Safety Science Journal
基金
国家自然科学基金面上基金资助(51974300
51674252)
江苏省研究生科研与实践创新计划项目(SJCX200816)
江苏省六大人才高峰资助项目(GDZB-027)
中央高校基本科研业务费专项资金资助项目(2020ZDPY0224)。
关键词
瓦斯压力
恢复曲线
时空分布
数值模拟
测压
gas pressure
recovery curve
spatial and temporal distribution
numerical simulation
pressure measurement
