Mine Safety Branch,China Coal Research Institute Company Limited State Key Laboratory of Coal Mining and Clean Utilization Beijing Research Center of Coal Mine Safety Engineering and Technology

为了研究突出煤层群综采工作面煤壁瓦斯涌出规律,以沙曲矿24207工作面煤壁为研究对象,分析了工作面煤壁瓦斯涌出特征;采用对工作面煤壁倾向长度微分的方法对其瓦斯涌出进行研究;构建了生产班和检修班突出煤层群综采工作面煤壁瓦斯涌出计算模型,得到了生产班和检修班煤壁瓦斯涌出量的计算方法。根据工作面长度及推进速度、煤壁初始瓦斯涌出强度及衰减系数和割煤机位置可求得任意时刻工作面煤壁瓦斯涌出量。为了验证公式的准确性,跟踪观测了沙曲矿24207工作面及其煤壁瓦斯涌出强度,生产班煤壁瓦斯涌出理论计算值与实测值相对误差为3.77%,检修班相对误差为14.65%,理论计算与实测数据较为符合。研究表明,在生产班煤壁瓦斯涌出增加并逐渐趋于稳定,在检修班煤壁瓦斯涌出量随煤壁暴露时间增加而迅速衰减。

in order to studly the gas emiss ion lavw of coal al nfruly-mechanized coal mining face in the ouburst sean grouptaking the coal wal in No. 24207calminin face of Shaqu Nine as the studly object.the paper analyzed the gas emission featuresof the coal wall n the coal minin face. cifferential method of the coal wall rended length in the coal mining face was applied to the stuty on gas emission.A gas emission calculaton model of the coal al in th fill ,mechanized coal miningface in outburst sean group was established for the production shift and the maitenance shift and the calcuation methocd of the gas emission amount in the cal awas obtained for the production shft and the maitenance shift According to the length of the coal mining face and the face pushing foward speed.the intal gas emision itensity of the cal wal.th attenu ation c eficient and the coal shearer ocation.the gas emission amount ofthe coal wall n the coal mining face could be obtainedat any tine. in order to prove the acuracy of the fomula, racing and survey was conducted on gas emission anount of No.24207 coal mining face and the coal walln Shaqu Nline.The theoretcal calculation value of the gas emission from the coal wall during the prodution shift had a elative eror of 3.77% to the actual measured valu .the relative eror of maintenance shift was 14.65% and the theoreical calculation and the actual measured data were ftied. The studly showed that the gas emiss on from coal wall during production shift would be increased and steadily be in stable and the gas emission amount from c al wall uring mantenance shft ould be apdly decreased with the exposed time of the coal wall increased.

国家自然科学基金资助项目(51504137)；北京市自然科学基金资助项目(2164075)；山西省自然科学基金资助项目(2013012007)；