2results about How to "Guarantee mining safety" patented technology

This invention discloses a phosphorus slag-based cementitious material, its preparation method, and its application, specifically relating to the field of cementitious materials technology. The cementitious material, by weight, comprises the following components: 60-90 parts phosphorus slag powder; 5-25 parts fly ash; 5-15 parts activator; 0.25-1.5 parts early-strength agent; and 0.2-0.5 parts water-reducing agent; wherein the specific surface area of ​​the phosphorus slag powder is 400-550 m². 2 / kg, particle size (D) 90 The particle size is 20-40 μm; the early-strength agent is selected from at least one of iron salts and aluminum salts. This invention uses phosphorus slag micro-powder with a specific specific surface area as the main substrate, with a high dosage, combined with fly ash, activator, early-strength agent, and water-reducing agent to obtain phosphorus slag-based cementitious materials. By optimizing the physical properties of the phosphorus slag micro-powder and constructing a suitable composite activator-early-strength system, the 28-day compressive strength of the cementitious material reaches over 61.0 MPa, achieving a balance between "high phosphorus slag content" and "high strength".

The application discloses a kind of mine seismic well ground joint monitoring network layout method, using the following steps: determining the area and boundary conditions of the monitored mining area;According to the geological factors and mining technical factors, the underground key area is divided;Establish the underground monitoring system;According to the effective monitoring coverage of ground microseismic sensor, the distribution of underground goaf, the ground monitoring key area is divided according to the direction of coal mining and tunneling;Exploring the bedrock of the ground monitoring area and determining the distribution position of the bedrock in the ground monitoring area;Select the bedrock in step five to establish the ground monitoring system.The underground monitoring system of the application can realize accurate monitoring of multiple parameters, effectively obtain the accurate change of coal rock attachment state, the ground monitoring system can realize large area monitoring on the ground, can cover the scale of mining area, command the overall situation, avoid omission, realize early warning, and ensure the safety of coal mining.