Preferential evaluation of coal filling mining scheme under building pressure based on improved grey target decision-making model of game theory.

The problem of coal compression under buildings is common in underground mining of coal mines in China. The selection of traditional mining programme is subjective and lacks scientific rationality. In order to solve this problem, this paper studies the evaluation index system and model applicable to the selection of coal filling mining scheme under buildings.

To evaluate the efficacy and safety of dezocine combined with lidocaine in local anesthesia for percutaneous testicular sperm aspiration.

A total of 130 patients who underwent percutaneous testicular sperm aspiration from March 2021 to February 2023 were randomly divided into a Dezocine group and a control group. The Dezocine group received a muscle injection of 0.05mg/kg Dezocine 30 minutes before surgery, while the control group received a muscle injection of 0.

Correction to "New Type of Similar Material for Simulating the Processes of Water Inrush from Roof Bed Separation".

[This corrects the article DOI: 10.1021/acsomega.0c03535.

New Type of Similar Material for Simulating the Processes of Water Inrush from Roof Bed Separation.

With an increase in the mining depth and breadth of coal mines in China, water inrush accidents from the roof bed separation of a mining face have become more frequent. A similar simulation experiment in the laboratory is an important way to study the dynamic seepage processes of separation water and explore the mechanism of roof bed separation formation. In this study, we develop a new type of similar material to simulate strata separation.

Experimental Study on the Basic Properties of a Green New Coal Mine Grouting Reinforcement Material.

Waste tires are internationally recognized as hazardous waste. Many waste tires storing in the open air for a long time will not only waste the land resources but also pollute the environment after the incineration. Meanwhile, the cumulative accumulation of fly ash in China has also been one of the largest sources of solid waste in coal mines.