Study on a High-Efficiency Mining Technology System for Gas Outburst in Coal Seams—Example of an H Coal Mine

Abstract

Coal will continue to play an important role in China’s economic development and social development in the coming decades. However, due to the complex distribution conditions of coal resources, the mining of coal resources is subject to various restrictions. Coal and gas outburst is an important issue in coal mining, and the threat to the mining of coal resources caused by high gas outburst activity has been receiving more attention. In order to solve the problems related to safe and efficient mining under coal seams with gas outburst, such as mining difficulties, large amounts of work, resource waste, no guaranteed gas treatment time, and low economic efficiency, it is necessary to innovate mining technology and methods for managing gas outburst in coal seams to improve the efficiency of coal mines and to solve the above problems. This study proposes a green mining technical method system known as the “L-H method”, which is applicable to the safe and efficient mining of coal seams with gas outburst based on combined theoretical analysis and numerical simulation. The following research results are achieved: (1) The “L-H method” is proposed, and a mining area model of coal seams with gas outburst is established. The specific details of the method and the implementation process are introduced. (2) Examples of H coal mine applications are presented, and the effects of the implementation of the “L-H method” are analyzed and summarized through mine pressure observations from roadways, and it is concluded that the implementation of top-cutting and pressure-relief technology has a good control effect on the roadway-surrounding rock and that gas extraction reaches the national standard of less than 8 m3/t for protrusion prevention; this ensures safety and also achieves efficient mining. This study will provide a good reference for the implementation of green mining methods to similar coal and gas outburst mines.

Development of Energy and Mining Governance System Based on New-Generation Information Technology

“…AI can improve the intelligence level of systems and mechanical actuators, as well as replace human labor to complete the supervision of complex and hazardous scenarios in the entire process of energy and mining, accurately distinguish various potential hazards, and effectively improve the perception of safe production and transportation [56,57]. The application of big data and cloud computing in diversified information assets enables regulatory systems to rapidly integrate safety regulatory data between energy regulatory departments at different levels, thereby eliminating information islands, realizing information sharing, and facilitating the management of regulatory authorities from a global perspective [58], as shown in Fig. 7.…”

Burst Failure Characteristics and Energy Evolution Law of Coal with Prefabricated Cracks at Different Angles

“…Te instability and failure of coal mine roadways are caused by the initiation, expansion, and connection of internal cracks in the coal body [1][2][3][4]. With the gradual deepening of coal mining, the joint cracks of the roadway surrounding rock are more developed, loose, and broken, and the deformation of the roadway is aggravated [5][6][7][8][9]. Te fracture of coal can be regarded as a process of energy conversion and transmission, and its fnal failure is a state instability phenomenon driven by energy.…”