基于水力割缝增透技术提高煤层瓦斯抽放效率研究———以保安煤业为例  

Improving Efficiency of Coal Seam Gas Drainage Based on Hydraulic Slotting and Permeability Enhancement Technology:A Case Study of Bao'an Coal Industry Co.,Ltd.

作　　者：李瑞森 LI Ruisen(Yangquan Co.,Ltd.,Shanxi Coal Transportation and Sales Group,Yangquan 045000,Shanxi,China)

机构地区：[1]山西煤炭运销集团阳泉有限公司,山西阳泉045000

出　　处：《能源与节能》2024年第6期93-95,208,共4页Energy and Energy Conservation

摘　　要：煤层瓦斯是一种宝贵的能源,但如果不加以控制,将成为煤矿开采中的一大灾害。井下煤层瓦斯抽采是降低瓦斯灾害风险最有效的方法之一,然而许多低透气性煤层,尤其是受构造作用严重破碎甚至粉化的构造煤层,瓦斯抽采难度较大。提高单一煤层瓦斯抽采效率的常规技术较多,但对于下部为软黏土构造煤亚层的特厚煤层,常规技术无法奏效。为加强对这类煤层的瓦斯抽采,提出了水力割缝瓦斯抽采技术,通过数值模拟分析了水力割缝后煤体的应力演化、塑性损伤、渗透率变化及瓦斯抽采情况。结果表明,采用水力割缝瓦斯抽采技术后,构造煤亚层中的大孔扩大了卸压增透范围,瓦斯抽采效率显著提高。Coal seam gas is a valuable energy,but if not controlled,it will also be a major disaster in coal mining.Underground coal seam gas extraction is one of the most effective methods to reduce the risk of gas disasters.However,many low-permeability coal seams,especially structural coal seams that are seriously broken or even pulverized by tectonic action,are difficult to extract gas.There are many conventional technologies to improve the efficiency of gas extraction in a single coal seam,but for the extra-thick coal seam with soft clay tectonic coal sub-layer,the conventional technology cannot work.In order to strengthen the gas extraction of the coal seam,this paper proposed a hydraulic slotting gas extraction technology,and analyzed the stress evolution,plastic damage,permeability change and gas extraction of the coal body after hydraulic slotting through numerical simulation.The results show that after the hydraulic slotting gas extraction technology is adopted,the large pores in the tectonic coal sub-layer expand the range of pressure relief and permeability enhancement,and the gas extraction efficiency is significantly improved.

关 键 词：瓦斯抽放 构造煤 渗透性 水力割缝 

分 类 号：TD712.6[矿业工程—矿井通风与安全]