هل ستصبح شريكنا القادم ؟
Imaging, three-dimensional (3D) mapping and ranging. Image and mapping sensors, such as visual, infrared (IR), and depth sensors, are typically used in the mining industry for remote and local surveillance of operations, equipment control and monitoring, and vehicle automation. They are also used in large-scale topography and mapping, …
Read More
Edinburgh Sensors, a sensor-based system manufacturer that specializes in sensors for mining operations, has been offering gas monitor technology for many years. Gascard NG, an infrared-based gas …
Read More
Fiber optic sensors have become increasingly attractive for application in advanced intelligent coal mines, which consist of extensive sensor network to monitor the structural integrity, environmental safety and production parameters. Fiber optic based strain (mining pressure), temperature, water pressure, methane gas, seismic and ultrasound sensors …
Read More
Therefore, to ensure the safety of underground coal mines, The article lists the principle of operation, mode of operation and applications of various types of sensors for monitoring toxic and ...
Read More
If blasting operations are used in the mine, then Carbon Monoxide (CO) can occur in large quantities. In addition, Hydrogen Sulphide can be present. The concentration of CH 4 depends upon the quality and depth of the coal seam: in general, the higher the energy value of the coal and the deeper the coal bed, the more CH 4 occurs.
Read More
The existing uneven clustering algorithm have disadvantages of coal mine with long strip structure. This paper proposed a UCEB-CMF protocol to improve the safety of coal mine monitoring system. The new protocol optimize the selection mechanism of the cluster head, avoid the lower residual energy nodes become the cluster head. Improve …
Read More
A typical longwall mine consists of a longwall face, goaf and intake and return airways. The layout of sensor node deployment in the maingate (intake airway) and tailgate (return airway) of a retreating longwall coal mine has been shown in Fig. 1.The gate roads are divided into a number of rectangular logical partitions known as monitoring regions (M).
Read More
Imaging, three-dimensional (3D) mapping and ranging. Image and mapping sensors, such as visual, infrared (IR), and depth sensors, are typically used in the mining industry for remote and local …
Read More
A wireless sensor network used at coal faces to acquire sensor data is designed. Based on the characteristics of coal faces, a special topology of the wireless sensor network is adopted, which makes the network more suitable for the surroundings of coal faces. By analyzing the relation between signal strength and the successful probability of …
Read More
Environment monitoring is important for the safety of underground coal mine production, and it is also an important application of Wireless Sensor Networks (WSNs). We put forward an integrated environment monitoring system for underground coal mine, which uses the existing Cable Monitoring System (CMS) as the main body and the WSN …
Read More
Expert methods for classifications of seismic hazards in coal mines. Two basic methods are routinely used by experts for the assessment of seismic hazards in Polish coal mines. These methods are often called seismic and seismoacoustic, respectively (Kabiesz et al., 2013). The essence of the seismic method is the analysis of …
Read More
Sensor-based detection and monitoring solutions for the mining industry include: Sensors to measure and monitor airflow and pressure in mine shafts. Temperature sensor remote monitoring systems. Gas and smoke detectors. Level measurement sensors and …
Read More
The CO-sensor, smoke sensor, temperature sensor, low frequency acoustic sensor, pump status, sensor water level sensor, etc. are some types of sensors being used in coal mines [3]. The sensors can also provide the information about the width of a wall so that the authorities can give the command to stop blasting and save the wall or …
Read More
In the past decade, gas sensors based on tunable diode laser absorption spectroscopy (TDLAS) have been extensively studied and tailored for use in the coal mine industry because of their ...
Read More
In the past decade, gas sensors based on tunable diode laser absorption spectroscopy (TDLAS) have been extensively studied and tailored for use in the coal …
Read More
High resistance to RH is an essential for sensors which used in coal mines. ... (25 °C) under UV excitation showed an acceptable response (~23%) which makes it possible to use it in coal mines ...
Read More
In the pursuit of automating the entire underground drilling process in coal mines, the automatic rod feeding technology of drilling robots plays a crucial role. However, the current lack of positional accuracy in automatic rod feeding leads to frequent accidents. To address this issue, this paper presents an algorithm for compensating positioning …
Read More
High resistance to RH is an essential for sensors which used in coal mines. ... (25 °C) under UV excitation showed an acceptable response (~23%) which makes it …
Read More
Mining foreman R. Thornburg shows a small cage with a canary used for testing carbon monoxide gas in 1928. George McCaa, U.S. Bureau of Mines
Read More
Robotic mining equipment plays an increasingly important role in the coal mining industry. Due to the complexity of the confined underground environment, available localization methods are limited, and restrict the development of coal mine robots (CMRs). Ultra-wideband (UWB) is a promising positioning sensor with high ranging accuracy. …
Read More
The Shenhua Baori Xile opencast coal mine (49°20′–49°27′N, 119°36′–119°45′E) was selected as the research area. The opencast coal mining area is situated in Hulun Buir City, China. The coal reserves are about 2.3 billion metric tons. The coal seam is shallow, low in ash, high in volatiles, extremely low in sulfur and low in ...
Read More
coal mine safety, gas sensor, TDLAS, methane, carbon monoxide, multi-gas Introduction Currently, coal is one of the primary energy sources, and it will remain so in the near
Read More
In view of the problems of explosive, corrosion and accidents in underground coal mine production, this paper designs a monitoring system based on wireless sensor network, which can monitor the gas concentration, temperature and humidity parameters, and alarm when the parameters exceed the fixed value. Experiments show that the system is stable …
Read More
Currently, laser methane sensors are used in more than 1,000 coal mines in China. This application shows that their advantages, such as stability and moisture resistance, have been recognized by the coal mine industry. …
Read More
A borehole deformation sensor for long-term stress monitoring in coal mine rock based on optical fiber Bragg gratings (FBGs) is presented. The sensor converts borehole deformation into optical fiber strain by using four rings. For each ring, two FBGs are bonded with the ring to measure the borehole deformation, and a reference FBG free …
Read More
For this multiple fiber Bragg grating (FBG) sensors can be used for detecting deviation in temperature in underground coal mines to detect the coal mine fire before its combustion. Conventionally, electrical temperature sensors like thermistors (range: − 50 to 250 °C), resistance temperature detectors (RTD) (range: − 196 to 482 °C), and ...
Read More
These sensors are all deemed one unit and are installed in coal mines. All sensor values are constantly transmitted to the think speak IoT platform for analysis. The developed system is primarily used to rescue employees' health conditions and to guarantee workers' safety. So that appropriate actions can be done whenever a potentially dangerous ...
Read More
Nowadays, wireless underground sensor network (WUSN) [2,3,4] is used for continuous monitoring of environmental parameters of underground coal mines. WUSN can be realized by deploying sensor nodes in the wall …
Read More
Instead, contact an Applications Engineer at GDS to discuss which detection system will best meet your needs. 1245 Butler Rd League City, TX 77573. 409-927-2980. 409-927-4180. Due to the many complexities associated with mining operations, it is essential the best possible detection systems be selected and installed in shafts.
Read More
In this paper, we propose a WSN-based fire monitoring system for underground coal mines using fuzzy logic approach. The sensor nodes are deployed in the underground coal mines for collecting the monitoring data, such as temperature and concentrations of various gases like CO, CO 2 and O 2. These data are input to the fuzzy …
Read More
