论文部分内容阅读
由于煤体吸附瓦斯能力强,高瓦斯低透气性突出煤层的施工、生产中存在众多安全隐患。在调查现有研究成果和现场实践经验的基础上,提出穿层和顺层深孔预裂松动爆破这一综合增透技术。通过大量现场实际操作,检验了此局部防突措施的效果和可行性。研究表明:通过深孔预裂松动爆破技术体系的实施,煤体中裂缝增多,孔隙率提高,排出了大量的瓦斯,残余瓦斯压力降低,减少了突出的势能,达到了防止突出或降低突出强度的目的。
Due to the strong adsorption capacity of coal gas, high gas permeability and low permeability coal seam construction, there are many hidden dangers in production. On the basis of investigating the existing research results and on-site practical experience, we propose a comprehensive antireflection technique of pre-splitting and deep-hole pre-cracking through strata. Through a large number of field operations, the effectiveness and feasibility of this partial outburst prevention measure were tested. The research shows that through the deep hole pre-cracking loose blasting technology system, the cracks in the coal body increase, the porosity increases, a large amount of gas is discharged, the residual gas pressure is reduced, the prominent potential energy is reduced, and the method of preventing protruding or reducing the protruding strength the goal of.