CN-121992858-A - Drainage system based on waste ditch treatment by coal gangue filling and construction method

Abstract

The invention relates to the technical field of slope protection engineering, in particular to a drainage system and a construction method based on waste ditch treatment by coal gangue filling. The system comprises a slope closure drainage structure, an upstream flood discharge drainage pipeline and a percolate collection pipeline and a construction method thereof. The design proposes a method of combining zonal drainage, water guide and drainage, can reduce the scouring of rainfall to the slope of the waste ditches to the greatest extent from the construction period to the operation period, is convenient to combine with other supporting structures, and ensures the safety of the slope of the waste ditches. Not only can practically solve the problems of land resource occupation and environmental destruction caused by coal exploitation, but also can expand land space, improve land use value and ecological environment of mining areas, and realize greening treatment of land space and improvement of soil fertility of agricultural cultivation.

Inventors

• Chang Weiya
• CHENG JIAMENG
• SUN YUAN
• SUN HUI
• CHEN XIAOYING
• AN YUELING

Assignees

• 中国矿业大学(北京)
• 北京清新泰华科技有限公司
• 北京智能中矿科技有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (1)

1. 1. A drainage system and a construction method based on waste ditch treatment of gangue filling comprise the steps of a slope closure drainage structure, an upstream flood discharge drainage pipeline, a percolate collection pipeline, a construction method thereof and the like.

Description

Drainage system based on waste ditch treatment by coal gangue filling and construction method Technical Field The invention relates to the technical field of slope protection engineering, in particular to a drainage system and a construction method based on waste ditch treatment by coal gangue filling. Background The coal gangue is a large amount of solid waste generated in the processes of coal resource development and stripping, tunneling, exploitation, washing, selecting, processing and the like, and the yield of the coal gangue is about 10% -20% of the exploitation amount of coal. At present, the current situation of comprehensive utilization of coal gangue in China is developed from 'mainly storing' to 'storing combination', and the coal gangue is utilized in a plurality of fields of fuel, building materials, roadbed filling materials, chemical raw materials, agricultural production, filling and the like. However, the comprehensive utilization technology can not meet the processing requirements of centralization, high yield and large scale of the coal gangue at present in China, and the accumulated historical gangue body amount in long-term coal mining production is huge, and the gangue is piled up in a mining area to form gangue hills, so that a large amount of land is occupied, and the atmosphere, water and soil can be polluted to form pollution sources, so that the pollution sources become 'stubborn diseases' for the development of the loess plateau mining area. The ecological treatment technology for the waste ditches filled with the coal gangue is a technical method for carrying out ecological restoration and treatment on the waste ditches in mining areas, and aims to realize win-win of comprehensive utilization of the coal gangue and ecological treatment of the waste ditches and improve the stability and biodiversity of an ecological system. In the Shaanxi Mongolian area, coal gangue is mainly filled into a coal mining subsidence area or a waste ditch, so that the utilization of the waste gangue is realized, and the waste gangue filling and reclamation technology can be regarded as continuous use. However, the accumulated dam body is affected by rainfall and upstream flood, the strength is reduced due to the increase of the water content of the rock-soil body, and the dam body is easy to be unstable. Meanwhile, the continuous heavy rainfall continuously washes the slope surface, so that a large amount of rock and soil mass of the slope surface is lost, the stability is further reduced, the safety of the dam body and the post-treatment work are seriously influenced, and therefore, the protection of a drainage system is an important content of the slope engineering. In the subsequent protection work, the waste ditch ecological management based on the gangue filling technology needs to arrange a water interception ditch at the top of a side slope of a pile-up dam body to prevent backflow rainwater from flowing backward, and a drainage pipeline prevents upstream water from impacting the dam body, so that the construction quality of the water interception ditch and the drainage pipeline directly relates to whether subsequent construction and ecological management procedures can be smoothly unfolded. At present, a brick water interception ditch is used for construction, soil body sedimentation deformation is caused in a rainy season, and the brick water interception ditch is easy to leak due to sedimentation cracks generated on the bottom and the side surfaces of the ditch due to the sedimentation of the soil body. In addition, the rigid water surface of the intercepting ditch is formed by concrete pouring, and the surface concrete is easy to crack and permeate water due to the influence of expansion caused by heat and contraction caused by cold. Both conditions can lead to water to infiltrate into the soil body of the side slope from the cracks, and the side slope protection fails when meeting water, so that the side slope collapses. Disclosure of Invention The application aims to provide a slope closure drainage structure, an upstream flood discharge drainage pipeline, a percolate collection pipeline and a construction method thereof, which are suitable for a gangue filling waste channel ecological management technology, and the slope closure drainage structure, the upstream flood discharge drainage pipeline and the percolate collection pipeline adopt a method of combining partition drainage, water guide and drainage, can reduce the scouring of rainfall on the waste channel slope to the greatest extent from the construction period to the operation period, are convenient to combine with other supporting structures, and ensure the safety of the waste channel slope, so that at least one technical problem related to the background technology can be solved. In order to solve the technical problems, the technical scheme of the application is as follows: The site surface runoff drainage system consists of t