A Safe and Efficient Mining Method with Reasonable Stress Release and Surface Ecological Protection

Abstract

Coal is an important basic energy source, widely distributed throughout the world, but resource abundance is uneven. Despite the need to develop and form new energy sources, coal energy maintains its dominant position. However, due to the uneven distribution and non-renewable nature of coal resources, the relationship between the supply and demand of coal resources is tight. The rational exploitation of coal and reducing resource mining wastes are particularly important at the present stage. The original mining method of the Zhangjiamao coal mine resulted in a large waste of coal resources. After replacing the “110 construction method”, the original advanced end-support was canceled, which saved a lot of process time and engineering costs and greatly improved the mine production efficiency. With an average mining depth of +300 m, the working face is in a safe and stable state, and the 110-mining process has little impact on surface subsidence. Its successful application provides a reference experience for other mines to promote resource-saving and efficient mining.

Results of research on the stability of mine workings, fixed by arched supports made of composite materials, in the conditions of the Pokrovske Mine Administration

“…In the scientific works [24][25][26], a team of authors has developed a decision-making system that allows optimizing operating parameters, reducing production costs, and choosing a structure of technological links with a given productivity level. Scientific works [27,28], published by foreign scientists are also devoted to the substantiation and implementation of new resource-saving technologies for supporting mine workings. The studies in [29][30][31] are aimed at substantiating 3D-printing technologies, which have been widely used over the past decade in various fields.…”

Air Flow Movement Law in Working Face and Gob with Roof-Cutting and Pressure-Releasing Mining: A Numerical Simulation and Engineering Verification

“…In order to reduce resource waste and improve coal recovery rate, He Manchao, an academician of the Chinese Academy of Engineering, put forward the theory of “roof cutting shortwall beam” in 2008, a new type of nonpillar mining technology-“roof-cutting and pressure-releasing” mining technology with roadway retained was also born. , This advanced mining method transfers the stress by “cutting the roof” to relieve the pressure of the roof, and then reserves a roadway of the working face through special support measures as the mining roadway adjacent to the working face in the future to serve the mining of the next working face. , (Taking a “roof-cutting and pressure-releasing” with retaining roadway working face with Y-type ventilation as an example, see Figure ). This mining method is called “110 mining method”, which requires only one roadway to be excavated for mining one working face without leaving coal pillars . This technology not only realizes no pillar mining, reduces the waste of coal resources but also optimizes the stress of surrounding rock in the stope and reduces the amount of roadway excavation. − Nowadays, the global coal resource situation is relatively severe, and “roof-cutting and pressure-releasing” without coal pillar mining has become the trend of future coal mine production …”

“…This mining method is called “110 mining method”, which requires only one roadway to be excavated for mining one working face without leaving coal pillars. 8 This technology not only realizes no pillar mining, reduces the waste of coal resources but also optimizes the stress of surrounding rock in the stope and reduces the amount of roadway excavation. 9 − 11 Nowadays, the global coal resource situation is relatively severe, and “roof-cutting and pressure-releasing” without coal pillar mining has become the trend of future coal mine production.…”