Application in coal mine transportation distance rapid filling, plugging and sealing engineering

Engineering application in the rapid filling and sealing engineering of coal mine transportation distance
The sealing of coal mine mining area is the main safety measure to prevent self-heating and fire of coal seam. Since the traditional airtight walls constructed of loess and cement have poor air tightness and are prone to cracks, the problem of air leakage has always been a difficult problem for underground fire prevention and fire extinguishing. In order to solve this technical problem, our company and relevant science and technology and engineering technicians from China University of Mining and Technology used Graining commercial water materials to successfully carry out long-distance express filling and sealing in Duoxin Coal Mine.
The high-water filling and sealing material filling and sealing project has excellent technical characteristics in terms of strength performance, expansion performance, and setting time. The wall can quickly achieve the special effect of airtightness. It is widely used in underground mines. It is of great significance to improve underground ventilation, implement rapid sealing, extinguish fires, improve the management level of one ventilation and three preventions, and build a comprehensive mine.
Graining high-water filling and sealing materials for coal mines are mainly made of high-water materials as cementing materials. The filling aggregate uses fly ash from thermal power plants and adds an appropriate amount of chemical expansion agent. In the rapid filling and sealing construction, according to the above production process of two cementitious materials, aggregates and admixtures A and B, adding appropriate amounts of water, stirring and blocking in the two facilities A and B, the mud is sent for filling location and condense into a filling body in a relatively short period of time. Moreover, the filling body can expand on its own before solidifying according to project needs. This expansion performance can not only achieve tight and effective joint sealing between the filling body and the tunnel periphery, but also reduce the amount of filling material, thereby reducing operating costs.
The filling body is relatively flexible, resistant to extrusion without cracking, has good air tightness and is impermeable to water. It solidifies quickly during the fire extinguishing and sealing process, and the filling body solidifies and takes shape in as little as a few minutes to adapt to the requirements of different conditions in underground engineering.
Use high-water filling and sealing materials for rapid filling and sealing of mines. This technology is the first of its kind at home and abroad. The material is an inorganic non-metallic material, non-toxic, harmless, non-corrosive and unnatural, and the filling and sealing body has high strength. , adjustable expansion, good integrity and air tightness.
.Leakage prevention of harmful gases in goaf areas. Seal cracks in surrounding rock to prevent gas seepage. Sealing and filling of gas drainage drilling sites
. Fire extinguishing and smoldering materials in goaf areas. Construct fire sealing and firewalls within a certain range
3. Fill and anchor-blast supporting materials after merging with the tunnel wall. Back-wall filling of gob-side tunnels and coal pillar crack sealing for gob-side tunnel excavation
. Permanent sealing of goaf areas under pressure conditions, filling and temporary sealing of tunnel pop-up areas.