恒大煤矿复合厚煤层分层开采瓦斯治理技术研究

发布时间：2018-06-03 09:31

本文选题：复合厚煤层 + 分层开采　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：针对恒大煤矿153采区煤层高瓦斯、煤层厚、夹矸层多等赋存特点,提出了复合厚煤层分层开采工作面开采工艺；在井下选取3个试验点进行相关瓦斯基础参数测定；分析了厚煤层分层开采时瓦斯涌出量来源,总结了瓦斯涌出规律,利用分源法预测瓦斯涌出量,为瓦斯抽采工艺提供主要参数依据；针对153采区5333(A)综采、5333(B)综放工作面瓦斯涌出的特点,提出了复合厚煤层分层开采特殊条件下的瓦斯治理成套技术,5333(A)综采工作面采取了回采前瓦斯预抽、高位巷瓦斯抽采、回风巷埋管抽采和地面钻孔抽采的综合抽采方案；由于顶分层开采后对底分层瓦斯充分解放,5333(B)综放工作面开采时,采用了预抽钻孔抽采和埋管抽采相结合的方案；成功解决了顶分层工作面回采过程中极高瓦斯涌出和底分层工作面回采时大面积连通采空区而导致瓦斯大量涌出的难题,使回风流中瓦斯浓度降到0.6%以下,保障了矿井采掘安全,同时也为其他类似矿井安全生产起到重要的指导意义。
[Abstract]:In view of the characteristics of high gas, thick coal seam and many gangue layers in No. 153 mining area of Hengda Coal Mine, this paper puts forward the mining technology of stratified mining face in compound thick coal seam, and selects 3 test points to measure the basic parameters of gas. This paper analyzes the source of gas emission during stratified mining of thick coal seam, summarizes the law of gas emission, and predicts the quantity of gas emission by means of split source method, which provides the main parameter basis for gas extraction technology. In view of the characteristics of gas emission in fully mechanized caving face (No. 5333B) (No. 5333A) (No. 153 mining area), this paper puts forward a complete set of technology for gas treatment under the special conditions of stratified mining in complex thick coal seam (No. 5333A) fully mechanized mining face adopts pre-drainage of gas before mining and gas drainage in high roadway. The comprehensive extraction scheme of underground pipe extraction and surface drilling extraction in return air roadway is adopted. When fully liberating the bottom stratified gas from bottom stratified gas after top stratified mining, the combined scheme of pre-drainage borehole extraction and buried pipe extraction is adopted. The problem of extremely high gas emission in the mining process of the top stratified working face and a large area connected to the goaf during the mining of the bottom stratified working face has been successfully solved, and the gas concentration in the return air flow has been reduced to below 0.6%. It ensures the safety of mine excavation and also plays an important guiding role in other similar mine safety production.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712

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