7107工作面水力压裂及爆破初采放顶效果对比分析  

Comparative analysis of initial mining roof-caving effects of hydraulic fracturing and blasting of 7107 working face

作　　者：刘俊 张宇科 LIU Jun;ZHANG Yuke(Wangzhuang Coal Mine,Shanxi Lu’an Environmental Protection Energy Development Co.,Ltd.,Changzhi 046000,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]山西潞安环保能源开发股份有限公司王庄煤矿,山西长治046000 [2]河南理工大学土木工程学院,河南焦作454000

出　　处：《陕西煤炭》2024年第12期71-77,共7页Shaanxi Coal

基　　金：国家自然科学基金项目(52374087)。

摘　　要：为从施工周期及经济预算角度对比分析爆破切顶与水力压裂2种卸压方式的卸压效果,以7107工作面为背景,通过数值模拟的研究手段,分别从施工周期角度设计了7 d、13 d、19 d这3种设计方案,从经济预算角度设计了40万预算、50万预算、60万预算3种设计方案。通过顶板初次垮落步距来确定各方案切顶卸压效果。结果表明,当施工周期大于7 d时,爆破切顶初次垮落步距均为20 m,卸压效果均达到预期,可保证7107工作面安全回采;当施工周期小于19 d时,水力压裂切顶卸压效果较差;施工周期大于19 d时水力压裂初次垮落步距为24 m,与爆破切顶效果相近,达到安全标准。当预算大于40万时,水力压裂垮落步距均为24 m,符合安全标准;预算为40万时,爆破卸压初次垮落步距为28 m,比相同预算条件下水力压裂大16.7%。预算为50万时,爆破卸压初次垮落步距为24 m,与40万预算条件下的水力压裂一致。预算为60万时,初次垮落步距减小至20 m,比40万预算条件下的水力压裂小16.7%。通过对比分析可知,在地质条件、施工时间、施工效果方面,爆破施工优于水力压裂施工;在瓦斯含量、施工成本、环境保护方面,水力压裂施工则优于爆破施工。In order to compare and analyze the pressure relief effect of blasting roof cutting and hydraulic fracturing from the perspective of construction period and economic budget,with the 7107 working face as the background,through the research method of numerical simulation,three design schemes of 7 d,13 d and 19 d were designed from the perspective of construction period.From the perspective of economic budget,three design schemes were designed with 400000 budget,500000 budget and 600000 budget.Through the initial collapse step distance of the roof to determine the effect of roof cutting and pressure relief of each scheme.The results show that:When the construction period is greater than 7 d,the initial collapse step distance of blasting roof cutting is 20 m,and the pressure relief effect meets expectations,which can ensure the safe mining of the 7107 working face.When the construction period is less than 19 days,the pressure relief effect of hydraulic fracturing roof cutting is poor.When the construction period is greater than 19 d,the initial collapse step distance of hydraulic fracturing is 24 m,which is similar to the effect of blasting and roof cutting,and meets the safety standard.When the budget is greater than 400000 yuan,the step distance of hydraulic fracturing collapse is 24 m,which meets the safety standards.When the budget is 400000,the initial collapse step distance of blasting pressure relief is 28 m,which is 16.7%larger than that of hydraulic fracturing under the same budget conditions.When the budget is 500000 yuan,the initial collapse step distance of blasting pressure relief is 24 m,which is consistent with the hydraulic fracturing under the budget of 400000 yuan.When the budget is 600000,the initial collapse step is reduced to 20 m,which is 16.7%smaller than the hydraulic fracturing under the budget of 400000.Through comparative analysis,it can be seen that blasting construction is better than hydraulic fracturing construction in terms of geological conditions,construction time and construction ef

关 键 词：水力压裂 爆破预裂 切顶卸压 数值模拟 

分 类 号：TD323[矿业工程—矿井建设] TD355