Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face
During advancing the working face at Guojiawan Coal Mine, hard rock faults are encountered, which hinder the normal cutting of the shearer. Hydraulic fracturing is applied to pretreat the hard rock materials. Un-directional hydraulic fracturing experiments in transparent gelatin samples are carried...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/14/24/11908 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846106025198878720 |
|---|---|
| author | Haojie Li Benben Liu Qingyuan He Yanan Gao Dan Ma Haiyan Yang Jingyi Cheng Jiqing Ye Guoqiang Liu |
| author_facet | Haojie Li Benben Liu Qingyuan He Yanan Gao Dan Ma Haiyan Yang Jingyi Cheng Jiqing Ye Guoqiang Liu |
| author_sort | Haojie Li |
| collection | DOAJ |
| description | During advancing the working face at Guojiawan Coal Mine, hard rock faults are encountered, which hinder the normal cutting of the shearer. Hydraulic fracturing is applied to pretreat the hard rock materials. Un-directional hydraulic fracturing experiments in transparent gelatin samples are carried out. The influence of the differential stress, the borehole dip angle on the initiation and propagation of un-directional hydraulic fractures (HFs) are investigated. Three field test schemes of hydraulic fracturing are proposed and implemented at the 51207 working face of Guojiawan Coal Mine. Compared with the results of different test schemes, the cutting current ratio of the shearer is reduced by 51.70% and the cutting efficiency is increased by 89.93%. Therefore, the feasibility of hydraulic fracturing to improve the cuttability of the hard rock materials is verified, which provides a theoretical basis and field guidance for hydraulic fracturing pretreatment of the hard rock materials at a coal mining working face. |
| format | Article |
| id | doaj-art-dbaf2772bdd24ac09fa3d3e27f33feee |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-dbaf2772bdd24ac09fa3d3e27f33feee2024-12-27T14:08:44ZengMDPI AGApplied Sciences2076-34172024-12-0114241190810.3390/app142411908Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working FaceHaojie Li0Benben Liu1Qingyuan He2Yanan Gao3Dan Ma4Haiyan Yang5Jingyi Cheng6Jiqing Ye7Guoqiang Liu8Key Laboratory of Deep Coal Resource Mining of Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining of Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining of Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining of Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining of Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaJiangxi Copper Company Limited, Nanchang 330012, ChinaChina Railway 19th Bureau Group Corporation Limited, Beijing 100176, ChinaDuring advancing the working face at Guojiawan Coal Mine, hard rock faults are encountered, which hinder the normal cutting of the shearer. Hydraulic fracturing is applied to pretreat the hard rock materials. Un-directional hydraulic fracturing experiments in transparent gelatin samples are carried out. The influence of the differential stress, the borehole dip angle on the initiation and propagation of un-directional hydraulic fractures (HFs) are investigated. Three field test schemes of hydraulic fracturing are proposed and implemented at the 51207 working face of Guojiawan Coal Mine. Compared with the results of different test schemes, the cutting current ratio of the shearer is reduced by 51.70% and the cutting efficiency is increased by 89.93%. Therefore, the feasibility of hydraulic fracturing to improve the cuttability of the hard rock materials is verified, which provides a theoretical basis and field guidance for hydraulic fracturing pretreatment of the hard rock materials at a coal mining working face.https://www.mdpi.com/2076-3417/14/24/11908rock materials cuttabilityhydraulic fracture re-orientationvisualized hydraulic fracture experimentrock fault at coal mining working face |
| spellingShingle | Haojie Li Benben Liu Qingyuan He Yanan Gao Dan Ma Haiyan Yang Jingyi Cheng Jiqing Ye Guoqiang Liu Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face Applied Sciences rock materials cuttability hydraulic fracture re-orientation visualized hydraulic fracture experiment rock fault at coal mining working face |
| title | Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face |
| title_full | Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face |
| title_fullStr | Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face |
| title_full_unstemmed | Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face |
| title_short | Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face |
| title_sort | improving hard rock materials cuttability by hydraulic fracturing at mining working face |
| topic | rock materials cuttability hydraulic fracture re-orientation visualized hydraulic fracture experiment rock fault at coal mining working face |
| url | https://www.mdpi.com/2076-3417/14/24/11908 |
| work_keys_str_mv | AT haojieli improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT benbenliu improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT qingyuanhe improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT yanangao improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT danma improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT haiyanyang improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT jingyicheng improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT jiqingye improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface AT guoqiangliu improvinghardrockmaterialscuttabilitybyhydraulicfracturingatminingworkingface |