大采高工作面矿压显现与瓦斯涌出关系研究  

Research on Relationship between Strata Behavior and Gas Emission in Working Face with Large Mining Height

作　　者：毕建乙 BI Jian-yi(Xiegou Coal Mine,Shanxi Xishan Jinxing Coal Electricity Group Co.,Ltd.,Luliang,shanxi,033662)

机构地区：[1]山西西山晋兴能源有限责任公司斜沟煤矿,山西吕梁033602

出　　处：《煤炭科技》2019年第1期1-5,共5页Coal Science & Technology Magazine

基　　金：国家自然科学基金资助项目(51204088)

摘　　要：根据现场实测斜沟煤矿18205工作面的液压支架支护阻力、超前支承压力及瓦斯浓度情况,分析研究大采高工作面矿压显现与瓦斯涌出的规律,结果证明:18205工作面矿压显现增大时,瓦斯浓度显著升高;在周期来压时煤岩体卸压增流,工作面瓦斯浓度明显升高。同时提出用高位裂隙带钻孔来治理邻近层瓦斯,发现在周期来压期间钻孔瓦斯抽采量明显增加,与来压步距基本一致,且高位裂隙带钻孔能有效拦截邻近层瓦斯,上隅角瓦斯浓度显著降低,有效保障了工作面安全回采。According to the field measurement and analysis on the supporting resistance,advanced support pressure of hydraulic support,and gas concentration in the 18205 working face of Xiegou Coal Mine,the law of rock pressure appearing and gas emission in the large mining height working face was summarized.The results showed that when the strata behaviors increases in the 18205 working face,the gas concentration rises significantly;Pressure relief and flow increase of coal and rock mass appears during the period of periodic weighting,and the gas concentration in the working face increased obviously.At the same time,the high-level fracture zone boreholes were used to control the adjacent layer gas.It was found that the gas extraction rate of boreholes increases obviously during the period of periodic weighting,which is basically consistent with the weighting step.The high-level fracture zone boreholes can effectively intercept the adjacent layer gas,and the gas concentration in the upper corner is significantly reduced,thus effectively ensuring the safe mining of the working face.

关 键 词：瓦斯涌出 周期来压 超前支承压力 采动裂隙场 矿压显现 采动应力 

分 类 号：TD323[矿业工程—矿井建设]