郝明, 张勃阳.工作面过断层静态致裂技术参数优化研究[J].河南理工大学学报（自然科学版）,2022,41(6):16-23.

HAO M, ZHANG B Y.Study on parameter optimization of static crushing technology in working face containing faults[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(6):16-23.

工作面过断层静态致裂技术参数优化研究

郝明1,2, 张勃阳3,4

1.国能榆林能源有限责任公司，陕西 榆林  719000；2.中国矿业大学 矿业工程学院，江苏 徐州  221116；3.河南理工大学 土木工程学院，河南 焦作  454000；4.河南理工大学 能源科学与工程学院，河南 焦作  454000

摘要:静态致裂技术在煤矿开采中应用日益普遍，但不同的致裂参数对岩体致裂效果影响较大。为了设置合理的静态致裂参数，确保工作面顺利通过断层坚硬岩体，以郭家湾煤矿51106综采工作面过小断层为例，首先，通过力学理论分析静态破碎剂致裂机理；其次，采用数值模拟方法定性定量分析不同致裂孔的布置方式、直径、孔距与孔径比，以及不同岩体边界条件对粉砂岩破碎效果的影响。结果表明：岩体在静态致裂过程中以拉伸破坏为主，中间夹杂少量剪切破坏；当致裂岩体顶面以及两侧均为自由面时，其3项致裂效果指标均最高，静态致裂效果最好；在致裂孔钻孔成本和施工难度随直径变化不大的情况下，随着致裂孔直径增大，单位面积岩体的相邻致裂孔贯通率、开裂率和损伤率均逐渐增大，且增大越来越快；从性价比和岩体致裂开采考虑，最合理的致裂孔孔距与孔径比为6～7。

关键词:静态致裂技术;断层;数值模拟;参数优化;致裂效果指标

doi:10.16186/j.cnki.1673-9787.2021070017

基金项目:国家自然科学基金资助项目（51108207）；冻土工程国家重点实验室开放基金资助项目（SKLFSE201514）；中国博士后基金资助项目（2015M581403）

收稿日期:2021/07/06

修回日期:2021/09/01

出版日期:2022/11/25

Study on parameter optimization of static crushing technology in working face containing faults

HAO Ming1,2, ZHANG Boyang3,4

1.China Energy Yulin Energy Co.，Ltd.，Yulin  719000，Shaanxi，China；2.School of Mines，China University of Mining and Technology，Xuzhou  221116，Jiangsu，China；3.School of Civil Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China；4.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China

Abstract:Static crushing technology has been widely used in coal mining，but different crushing parameters often have a great influence on the crushing effect of rock mass.In order to set reasonable static fracturing parameters to ensure that the working face smoothly passes through the hard rock mass of the fault，the 51106 fully mechanized mining face of Guojiawan coal mine encountering small fault was taken as an example in this paper.First，the crushing mechanism of static crushing agent was analyzed through mechanical theory，and then numerical simulation methods were used to qualitatively and quantitative analysis the influence of different rock mass boundary conditions，different fracture hole layouts，different fracture hole diameters and different pitch and aperture ratios on the siltstone crushing effect.The results showed that the crushed rock mass was mainly tensile failure in the static fracture process，and a small amount of shear failure was mixed between the tensile failures； When the top and both sides surfaces of the crushed rock mass were free，the three crushing effect indexes were the highest，and the static crushing effect was the best；Under the circumstance that the cost of crushing hole drilling and the difficulty of construction did not change much with the diameter，as the diameter of crushing hole increased，the penetration rate，cracking rate and damage rate of adjacent crushing holes per unit area of rock mass gradually increased，and the rate of increase was getting faster and faster； From the perspective of cost performance and rock crushing and mining requirements，the most reasonable pitch and aperture ratio of fracturing hole was 6～7.

Key words:static crushing technology;fault;numerical simulation;parameter optimization;fracturing effect index

 003_2021070017_郝明_H.pdf