高压空气爆破致裂效果影响因素分析

发布时间：2018-05-27 19:36

本文选题：地应力 + 高压空气爆破　；参考：《煤矿安全》2017年05期

【摘要】：为了提高低透气性煤层的增透效果,提出了高压空气爆破增透技术,阐述了高压空气爆破技术工作原理和工艺流程,利用高压空气的瞬间爆破冲击煤体,使煤体产生裂隙网络,从而有效地增加煤层透气性,同时分析了影响高压空气爆破煤体致裂效果的几个影响因素。通过数值模拟,研究地应力、高压气体、煤体硬度、瓦斯压力对高压空气爆破时裂隙产生的影响,结果显示高压空气爆破冲击可以有效地使煤岩介质产生破碎裂纹,地应力对裂隙扩展效果具有明显的抑制作用;高压气体、煤体硬度、瓦斯压力的大小对裂隙的产生和扩展具有积极作用。
[Abstract]:In order to improve the penetration effect of low permeability coal seam, the high pressure air blasting technology is put forward, the working principle and process flow of high pressure air blasting technology are expounded. The coal body is produced by the instant blasting of high pressure air to make the coal body produce fracture network, thus effectively increasing the permeability of the coal layer, and analyzing the influence of high pressure air blasting at the same time. Through numerical simulation, the influence of ground stress, high pressure gas, coal body hardness and gas pressure on the fracture of high pressure air blasting is studied by numerical simulation. The result shows that the high pressure air blasting can effectively make the coal rock medium crack the crack, and the ground stress can obviously suppress the crack expansion effect. High pressure gas, coal hardness and gas pressure play a positive role in the generation and expansion of fractures.
【作者单位】：煤科集团沈阳研究院有限公司;煤矿安全技术国家重点实验室;
【基金】：“十三五”国家大型油气田及煤层气开发科技重大专项资助项目(2016ZX05045-004-004)
【分类号】：TD235

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