Rock Fracturing Characteristics and Roadway Expansion Application of Static Crushing Agent under Multi-Row Drilling Condition
Source abstract
Abstract
Static crushing agent (SCA) offers advantages such as good safety, no harmful gases, and minimal vibration, making SCA ideal for rock crushing in mines or underground engineering. To scientifically implement the section expansion of mine roadway, the rock mechanical parameters, SCA expansion properties, and cracking behavior of surrounding rock were investigated using laboratory tests, numerical simulations, and field experiments. Results indicate that the smaller hole spacing of SCA improves the fracturing effect on rock mass, reduces the required fracture initiation stress and penetration stress, and the presence of a free surface aids in fracture development in the rock mass. Optimal borehole design parameters and spacing distributions of the SCA were determined, and corresponding construction techniques of roadway expansion were proposed. Field tests demonstrate that static crushing technology, under multi-row drilling conditions, is highly effective for rock roadway expansion projects. These findings provide valuable guidance for non-explosive expansion and other roof breaking treatment projects.
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Research context
OpenAlex topics: Geomechanics and Mining Engineering · Rock Mechanics and Modeling · Tunneling and Rock Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Funding
National Natural Science Foundation of China · Program for Innovative Research Team (in Science and Technology) in University of Henan Province · Key Research and Development Project of Henan Province · Key Research Project of Institutions of Higher Education in Henan Province · National Natural Science Foundation of Henan Province
References (26)
Show source-provided references
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