149results about How to "Avoid secondary disasters" patented technology

The present invention discloses methods and system for coal mine downhole personnel locating and mash gas concentration dynamic monitoring, the system includes: CAN bus network, wireless sensor network and data conversion device. CAN network connects with wireless transducing network connections by data switching device, and by using wireless sensor network self-organizing, multi- skip, data acquisition and processing, and wireless communicating characteristic, the invention designs a system about out-in well personnel work attendance and moving vehicle zone location in coal mine well, and a system for monitoring gas dynamic concentration. The system and method overcome the current deficiency of operating gas monitoring system and personnel position location system respectively, not only personnel zone location and dynamic gas testing is realized, but also allocation is obtained about personnel arrangement and moving mechanical equipment before the accident, this provides reliable data for rescuing miner and avoiding second disaster.

A method for comprehensive utilization of red mud, phosphogypsum and coal gangue comprises the following steps: red mud, phosphogypsum and coal gangue are used as main original burning materials, a correction material is taken as a secondary original burning material, a homogeneous moisture material is prepared through two-stage batching process and is shaped or dried and crushed, and then a clinker product including main ingredients of dicalcium silicate, calcium sulphoaluminate and calcium sulphoferrite is prepared through calcination. The clinker produced by the method can be not only directly sold as a product but also further processed into a cementing material or product for sale by utilizing the prior art. The method provided by the invention is simple in process and low in investment, the production scale can be either big or small, a rapid hardening early strength clinker produced by the method is wide in use and relatively higher in value, not only are lots of clay resources and non-renewable burning coal saved, but also environmental pollution caused by waste pollutants are effectively reduced, secondary disasters is prevented, and high industrial competitiveness and favorable investment economical efficiency are realized.

The invention relates to the asymmetric stress distribution law of a large-dip-angle coal bed tight roof and stress field evolutionary characters after directional blasting pressure relief and provides a targeted large-dip-angle coal mining rock burst orientation prevention method. The method comprises the steps that 1. roof energy releasing is carried out, according to the stress distribution law of the tight roof, ahead roof deep hole blasting design is carried out, and the purposes that elastic energy in a zone is released, and roof weighting steps and intensity are reduced are achieved; 2. secondary energy consumption is carried out, according to the stress field evolutionary characters after roof orientation elastic energy releasing, elastic energy stored in coal bodies at middle-lower zones in a working face is consumed, and secondary disasters are avoided; and 3. secondary danger relieving is carried out, for a determined dangerous zone, roof deep hole blasting hole and coal body pressure relieving blasting are carried out in time, and a large amount of elastic energy in coal and rock masses is released. Finally, the scour-prevention effects of step-by-step pressure relieving and prevention first are achieved.

The invention relates to an electric car battery swap station power battery thermal runaway emergency disposal system. The system comprises a closed tank type battery shelf, a gas extinguisher, an electrical control device, a fume extractor and a fire-resistant rolling shutter door wherein the battery shelf is internally layered; each layer is divided into a plurality of zones; all the zones are physically partitioned through fireproof plates; each zone is internally provided with at least one power battery and internally provided with a power battery thermal runaway sensing device; the gas extinguisher communicates with all the zones through gas pipelines and nozzles independently; the electrical control device is in signal connection with the gas extinguisher and the power battery thermal runaway sensing devices; a blast capacity power device of the fume extractor is in signal connection with the electrical control device; in the normal state, the blast capacity power device operates with a low blast capacity, and the fume extractor is used as a radiating air flue; in the thermal runaway state, the blast capacity power device operates with the maximum blast capacity; and the fire-resistant rolling shutter door is in signal connection with the electrical control device.

The invention provides a composite vacuum heat preservation box for an energy storage sodium sulfur battery module. The composite vacuum heat preservation box is characterized in that a composite vacuum heat preservation technology is adopted; the outer wall temperature of the heat preservation box is room temperature; a planar heating mode is adopted in the heat preservation box; and a plurality of thermal compensation points are provided in the heat preservation box according to a heating size in the heat preservation box, so that a temperature blind area brought by large size of the heat preservation box is eliminated. Heat generated by a heating source in the heat preservation box can be maintained in the heat preservation box to the greatest extent, so that the problem of non-uniform heat or heat loss in a large-size heat preservation state can be solved; the outer wall temperature of the heat preservation box is the room temperature, adverse impact is not caused to the running environment around the heat preservation box; a heat preservation layer of the heat preservation box is less than that in a non-vacuum heat preservation mode, so that the heat preservation box has the advantages of low cost and maintenance freeness.

The invention relates to a method for preparing a light porous sintering material by red mud and plant residues. The method comprises the following steps: by using the red mud with the water content being less than or equal to 65wt% and the plant residues with the water content being less than 70wt%, preparing and mixing materials; rolling and mixing; moulding; and sintering to obtain the light porous sintering material. The method which utilizes waste red mud and plant residues wide in source and large in output can produce serial products such as water permeable paving products, filtering products, products for sound absorbing materials, catalytic products, light panels or heat-insulating and sound-proofing bricks which are wide in purpose and high in value with low cost. The method has industrial competitiveness and good investment economical benefit. Meanwhile, not only are a lot of clay resources and non-renewable fuel coal as building materials and chemical product raw materials saved to realize industrial emission reduction of Co2, but also the pollution of waste pollutants red mud and plant residues to water, soil and air can be effectively solved, and secondary disasters are prevented.

The invention discloses a sensing / detecting device capable of reflecting an internal force change and internal displacement of rock-soil. The sensing / detecting device comprises a sensor, sensing rods and pulling ropes, wherein two ends of the sensor are respectively connected with one end of each pulling rope; the other ends of the pulling ropes are connected with the sensing rods; and two sensing rods are fixed into the rock-soil; the sensor is composed of a sliding rod assembly, an outer sleeve and an inner resistance wire ring; the sliding rod assembly and the inner resistance wire ring are installed inside a sleeve; one end of a sliding rod is connected with a sliding rod connecting bolt; the other end of the sliding rod is fixed on a spring support ring on the rear end of the sliding rod; a stressed spring is sleeved on the sliding rod; a sliding brush is installed on the spring support ring on the rear end of the sliding rod and is contacted and communicated with resistance wires; stress changes of the sensing rods are transmitted to the sensor, then a displacement change is generated at a position where the sliding brush is contacted with the resistance wires, output leads of the resistance wires and a output lead of the sliding brush are changed in length, resistance is changed, therefore, a change of the the rock-soil is obtained by measuring the resistance between the output leads of the resistor wires and the output lead of the sliding brush. The sensing / detecting device is simple in structure, low in cost, high in reliability and convenient and practical.

The invention discloses a debris flow control dam for adjusting peak discharge as well as a design method and application thereof. The debris flow control dam includes a dam foundation and a dam body, wherein a flow control hole used for downstream discharging debris flow is formed in the bottom of the dam body, and a downflow weir is arranged at the top of the dam body; the downflow wire is positioned right above the flow control hole; altitude difference between the top surface of the flow control hole and the bottom surface of the downflow wire exists; sizes of the cross sections of the flow control hole and the downflow wire, and the altitude difference between the top surface of the flow control hole and the bottom surface of the downflow wire are respectively confirmed according to parameters such as the maximum peak discharge of debris flow, downstream designed discharge and diversion quantity, downstream designed silt storage quantity, and duration time of peak discharge of debris flow exceeding the design flow. According to the invention and compared with the prior art, flow process of the debris flow can be adjusted and controlled through fully utilizing the adjusting storage capacity of the flow control dam, the flow of discharged debris flow can be controlled within a designed flow range, the efficiencies of the downstream discharge and diversion project and the silt storage project are given to full play, so that safeguard for the downstream targets of protection is guaranteed, and generation of secondary disaster is avoided.

The invention discloses an Internet of Things-based intelligent fire fighting system, which comprises a fire signal collecting device, a fire fighting facility state collecting device, a sound-light alarm device, an automatic fire extinguishing device and a central control unit, wherein the fire signal collecting device, the fire fighting facility state collecting device, the automatic fire extinguishing device and the sound-light alarm device are in communication connection with the central control unit respectively; the fire signal collecting device collects fire information; the fire fighting facility state collecting device collects the operating state of the fire fighting facility; the sound-light alarm device performs alarm; and the central control unit comprises an analyzing unit ,an automatic fire extinguishing device valid period management unit, a user disposal information pushing unit, a fire fighting disposal information pushing unit, a scene selection unit, a user management unit and an alarm unit. The user can orderly and effectively perform fire fighting and self-rescue according to the push disposal method, the loss in the fire is reduced, a firefighter is helped to be fully prepared, and the quickest and most effective rescue measures are adopted.

A steel pipe constrained high-strength steel section-concrete column with high axial pressure ratio and high earthquake-proof and fire-proof performance is composed of several longitudinal reinforcing bars, several reinforcing hoops for fixing said longitudinal reinforcing bars, the steel sections in said reinforcing hoops, the steel pipe surrounding said reinforcing hoops and with both open ends, and concrete cast in said steel pipe.

The invention discloses a microbial rotten bacterium agent as well as a preparation method and an application thereof. The microbial rotten bacterium agent is formed by mixing and compounding bacillus psychrosaccharolyticus, geobacillus stearothermophilus and bacillus thuringiensis in proportion. The invention further provides the preparation method of the microbial rotten bacterium agent. Based on the optimization combination of the bacillus psychrosaccharolyticus, the geobacillus stearothermophilus and the bacillus thuringiensis, the rotten time is shortened by 10 to 20 days; the deodorization is carried out effectively during the rotten process, so that the environment pollution is avoided; the fatality rate of pests and worm eggs can reach 100%. The rotten agricultural / animal wastes or enteromorpha can directly serve as base fertilizers tilled into the soil, so that the soil structure is improved; the soil fertility is enriched; beneficial bacteria in the soil are increased. Thus, infectious diseases spreading via the soil are avoided.

The invention discloses a skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations, and belongs to the technical field of safety engineering of liquefied natural gas. The skid-mounted LNG leakage diffusion restrain and emergency device comprises a movable skid-mounted pedestal, the movable skid-mounted pedestal is provided with a foam mixed liquor barrel and a nitrogen steel cylinder, the nitrogen steel cylinder and the foam mixed liquor barrel are connected through a nitrogen delivery pipe. A high-multiple foam generator is disposed over the foam mixed liquor barrel, the foam mixed liquor barrel is connected with the high-multiple foam generator through a foam mixed liquor delivery pipe, an explosion-proof blower is mounted to the rear end of the high-multiple foam generator, the explosion-proof blower is connected with a mobile power supply, and the mobile power supply is disposed on the movable skid-mounted pedestal. The skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations can be applied to places such as an LNG station, an LNG receiving station, a liquefaction factory, an LNG peak-shaving station and a liquefied petroleum gas station. The skid-mounted LNG leakage diffusion restrain and emergency device can be immediately used if large-area leakage occurs in an LNG station, high-multiple foam is generated to restrain the steam cloud in an LNG liquid pool of evaporation and diffusion, the evaporation rate can be reduced, and the severe secondary disaster can be prevented.

The invention relates to a sinking and floating platform for deep sea raising. The sinking and floating platform for deep sea raising comprises a net cage, a main cabin arranged on the middle portionof the net cage, and a plurality of sinking and floating buckets evenly distributed around the net cage; a plurality of sinking and floating boxes are arranged in the main cabin, and the sinking and floating boxes communicate with the sinking and floating buckets; and a valve assembly used for filling and discharging water is arranged on the sinking and floating boxes. The purpose is to provide the sinking and floating platform for deep sea raising, by means of the sinking and floating platform for deep sea raising, the extra large raising net cage with large capacity can be built in a deep remote sea area, and the platform plays a multifunctional role. The sinking and floating platform for deep sea raising has the advantages that when the sinking and floating platform for deep sea raisingsinks, through a water inlet control valve, sea water in the sinking and floating boxes can be transported into the sinking and floating buckets evenly, and when the sinking and floating platform fordeep sea raising floats upwards, through a water suction control valve, the sea water in the sinking and floating buckets is transported into the sinking and floating boxes evenly, and is dischargedinto sea, so that the balance stability of the whole platform is guaranteed.

The invention discloses an active and passive combined trailing high-performance protective screen. Multiple parallel supporting ropes are adopted to replace traditional up-down supporting ropes; the lowermost parallel supporting rope is lifted a certain distance away from the ground to form a lower open space which falling stone can pass through, so that a system has the open characteristic, and the falling stone can enter a trailing mesh area conveniently; meshes are divided into intercepting meshes and trailing meshes to enable the falling stone with a certain size to enter the trailing mesh area, after the falling stone is intercepted, through the open space at the lower portion of the lowermost parallel supporting rope and move to a prearranged collection area in the trailing direction; the trailing meshes can, to some extent, control the track of collapsed falling stone in a covered area. The active and passive combined trailing high-performance protective screen adopts the advantages of an active protective screen system and the advantages of a passive protective screen system, thereby having a high protection level and being easy to clean.

The invention discloses a method for determining a railway space line position in a karst mountainous area, and aims to enable a tunnel to integrally pass through a section with lower karst water gushing and mud bursting risks, effectively reduce railway engineering risks in the karst mountainous area, greatly reduce line selection cost and save investigation time limit. The method comprises the following steps: arranging a karst hydrodynamic profile along a karst slope in a direction perpendicular to a river; determining the highest underground water level line; determining a lowest underground water level line; dividing a karst vertical seepage zone, a karst seasonal variation zone and a karst horizontal flowing zone; through coordination and cooperation of spatial line position plane position adjustment and spatial line position longitudinal section position adjustment, enabling a railway tunnel to pass through a middle-low-risk karst vertical seepage zone, avoid a high-risk seasonal variation zone and an extremely-high-risk horizontal flowing zone, or form a herringbone slope surface in a preset tunnel.

The present invention discloses a pipeline monitoring early warning system based on a distributed coaxial-cable electric grid strain sensor, and relates to the technical field of stress and strain monitoring and pipeline deformation monitoring systems. The system comprises a distributed coaxial-cable electric grid strain sensor, a distributed interrogator, a monitoring system substation, a cloud server and a remote monitoring center workstation. The distributed interrogator is in data connection with the distributed coaxial-cable electric grid strain sensor, the monitoring system substation isin data connection with the distributed interrogator, the monitoring system substation is configured to transmit data to the cloud server through a GPRS transmission module, and the remote monitoringcenter workstation is in data connection with the cloud server through an Internet. The pipeline monitoring early warning system achieves wide-range, full-coverage and low-cost real-time pipeline monitoring early warning in its true sense so as to avoid generation of large-scale damaging and secondary disaster caused by geological disaster and improve the practicability.

The invention discloses a fault prevention and control device for a local ventilation system on a driving face of a coal mine. The fault prevention and control device comprises a prevention and control pipeline, wherein a fan air outlet and an air cylinder air inlet are arranged on the two end surfaces of the prevention and control pipeline, an all-negative pressure air flow port is arranged on the side wall of the prevention and control pipeline, a rotating shaft is movably arranged in the prevention and control pipeline through a shaft sleeve, a two-way air guide plate is connected on the rotating shaft, the two-way air guide plate is respectively larger than the fan air outlet and the all-negative pressure air flow port, when the two-way air guide plate is vertical, the fan air outlet can be closed, and when the two-way air guide plate is horizontal, the all-negative pressure air flow port can be closed. When power failure of a ventilator occurs or a fault occurs, all-negative pressure air flow of an extraction type ventilation mine can be utilized for continuously supplying air to the driving face so as to ensure the continuity of ventilation of the driving face of the mine and prevent the occurrence of local gas accumulation on the driving face; and when coal and gas burst or other catastrophes and air flow reversion occur on the driving face, the air flow with reversion at a catastrophe place can be prevented from carrying high-concentration gas to enter the local ventilator.

The invention discloses a high cutting slope anchor rope space framework supporting and retaining structure. The high cutting slope anchor rope space framework supporting and retaining structure comprises anti-sliding row piles formed by cast-in-place concrete and retaining walls cast on the anti-sliding row piles, wherein the anti-sliding row piles are transversely and longitudinally arranged in a staggered mode and connected to form a space framework structure; the anti-sliding row piles comprise inner anti-sliding piles, outer anti-sliding piles and cross beams arranged between the inner anti-sliding piles and the outer anti-sliding piles; longitudinal beams and the retaining walls are cast between the adjacent outer anti-sliding piles. The soil thrust bearing capacity is high, the large structural stiffness is achieved, the soil retaining effect is good, the cross dimension of the soil retaining structure can be reduced greatly, the cutting slope area is greatly reduced, and therefore the natural environment is protected, secondary disasters caused by slope cutting are avoided, the high cutting slope anchor rope space framework supporting and retaining structure is suitable for supporting and retaining high cutting slope road inner side slopes, the protection requirements of high and steep slopes with large soil side pressure can be met, and stability and safety of slope excavation are improved.

The invention discloses an isolation disaster reduction door control system for mine zones, which comprises a data analysis and control system, wherein the data analysis and control system comprises a disaster detection system, an underground control substation, a ground commanding and dispatching system and an execution system; the disaster detection system comprises a CO sensor probe, a CO2 sensor probe, a CH4 sensor probe, a smoke sensor probe, a temperature sensor probe, a wind speed sensor probe and a data acquisition monitoring system; the underground control substation is mutually communicated with the ground commanding and dispatching system in a wired mode to exchange information with the ground commanding and dispatching system in real time; and the execution system comprises an inert gas storage tank, a solenoid valve, a cylinder and an alarm checking device. According to the isolation disaster reduction door control system for the mine zones, major disaster accidents for the mines can be actively prevented in mine production, and disasters can be effectively prevented from spreading so as to avoid secondary disasters. Conditions can be created for rescuing and saving in the mine disaster accidents, and a disaster area and a threatened area can be effectively and automatically controlled and isolated.

The invention discloses a flexible connecting pipeline and a construction method for using the flexible connecting pipeline in base isolated buildings. The flexible connecting pipeline comprises a corrugated pipe and a joint connected to the end part of the corrugated pipe, wherein a net cover sleeves the corrugated pipe; a net cover pressing ring is arranged at the connecting part of the net cover and the joint; a circular thermoplastic rubber gasket is arranged on the inner side of the corrugated pipe. The flexible connecting pipeline is suitable for the base isolated buildings. The construction method comprises the following steps of 1) determining a net height of an isolation layer, 2) installing an isolation layer pipeline, 3) installing a fixed rack, 4) installing the flexible connecting pipeline. The flexible connecting pipeline is large in deformability and high in tensile strength, and residues accumulated in the pipeline are easy to clean. By the construction method, the problems that the isolation layer pipeline cannot deform during an earthquake and how pipelines are connected flexibly are solved; the method is easy to perform; the integral security of the base isolated buildings after the earthquake is improved; secondary disasters are prevented from being caused by the damaging of the isolation layer pipeline during the earthquake; the expectation effect of the base isolated buildings is achieved.

The invention discloses a nanometer modified no-slat inflaming retarding protection thermal pinch material and preparing method, which comprises the following steps: mixing up the material by weight; piling out; pelleting; squeezing pipe; cross bonding; heating; expanding; cooling and forming. The invention has good inflaming retarding effects, which is a kind of environment friend product.

The application discloses an explosion-proof bushing elevating seat, comprising a bushing elevating seat body, a metal mesh cover and at least one pressure release valve, wherein the bushing elevatingseat body is provided with at least one of the pressure release valves. The pressure release valves may release the pressure inside the bushing elevating seat body when a failure happens in the bushing elevating seat body to protect the bushing elevating seat body from damage, and the metal mesh cover is covered outside the bushing elevating seat body to avoid that the manual control cover and other components on the bushing elevating seat body fly out when a failure happens to cause secondary disasters. At the same time, the failure may be positioned according to the action sequence of the pressure release valve.

The invention discloses an energy-saving wear-resistant low-smoke halogen-free flame-retardant rubber composite material and a preparation method thereof. According to the invention, tin-coupled solution polymerized styrene-butadiene rubber / natural rubber / butadiene rubber is selected as a main body material, low-rolling-resistance carbon black and high-dispersion white carbon black are used as reinforcing agents, and a halogen-free flame retardant and a plasticizer are added; and a formula and a process are optimized so as to prepare the energy-saving wear-resistant low-smoke halogen-free flame-retardant rubber composite material. The prepared composite material has excellent wear resistance and impact resistance, good flame retardance and low rolling resistance, is energy-saving and environment-friendly, and can prolong service life, reduce running resistance and lower energy consumption when used for manufacturing rubber products such as automobile tires, rubber conveying belts and mill rubber linings. Meanwhile, the method is simple in process and easy to manufacture.

The invention belongs to the field of protective equipment for fire-fighting emergency rescue, which relates to an intelligent helmet for emergency rescue. A set of the intelligent helmet is integrated by a head computer system, an audio and video acquisition system, a gas sensor system, a temperature sensor system, a posture characteristic sensor system, a communication system, a shawl protectionsystem, a fireproof lining system, a composite material shell system, an air exhaler integrated mask system, a command software system, an infrared thermal imaging camera and the like carried and installed by the helmet. The helmet integrates the science and technology functions of protection, search and rescue and the like, and the rescue efficiency can be effectively improved, and disaster siteenvironment visualization, plan datamation, command interaction, judgment scientization and situation clarification are truly realized.

The invention discloses a combustible gas explosion protection system of a paint storehouse, a control method of the combustible gas explosion protection system and the paint storehouse. The combustible gas explosion protection system comprises a monitoring system, a ventilating refrigeration system, an alarm system and a fire extinguishing system, wherein the monitoring system comprises a PLC, a smoke control sensor, a temperature sensor and a combustible gas concentration sensor which are respectively connected with the PLC and a window; the alarm system is connected with the PLC and the smoke control sensor respectively, and comprises a signal light and a buzzer; and the fire extinguishing system is connected with the smoke control sensor and comprises a fire extinguishing bullet arranged at the indoor top and a leakage protector for controlling a main power supply. The combustible gas explosion protection system is improved on the basis of a container type paint storehouse, and the monitoring system is used for monitoring the environment in the storehouse; and a reasonable ventilating exhaust system is designed, and the fire extinguishing system is added, so that the ventilating air exchange capacity, the heat isolation property and the exhausted gas absorption capacity of a container are improved, the possibility of occurrence of harm and pollution is effectively reduced, and the paint storage safety is improved.

The invention relates to a high flame retardant fireproof power cable, which comprises an oxygen-barrier packing layer, wherein a plurality of conductors consisting of a plurality of soft copper wires are arranged in the oxygen-barrier packing layer; a second fireproof layer is arranged outside the oxygen-barrier packing layer; an armor layer is closely coated on the second fireproof layer; and a high flame retardant low smoke zero halogen sheath layer is arranged outside the armor layer. The invention has the advantages that when the high flame retardant fireproof power cable is manufactured, cables with different cores can be manufactured according to requirements of users, and a protective layer of the cable can be designed according to the laying environment of the users.

The invention discloses a halogen-free flame-retardant cable material, which is composed of the following raw materials in parts by weight: 62-67 parts of methyl vinyl silicone rubber, 30-35 parts of polystyrene, 7-11 parts of fumed white carbon black, 4-7 parts of talcum powder, 5-9 parts of attapulgite, 2-5 parts of dibasic lead phosphite, 6-10 parts of tricresyl phosphate, 3-6 parts of dilauryl thiodipropionate, titanic acid 2-5 parts of tetraisopropyl ester, 2-5 parts of ultraviolet absorber UV531, 1-3 parts of anti-aging agent IPPD, 2-5 parts of antioxidant MB, 3-6 parts of polyvinylpyrrolidone, 7-parts of zinc stearate 11 parts, mica powder 5-9 parts, halloysite 3-7 parts. The invention also discloses a preparation method of the halogen-free flame-retardant cable material. The cable material prepared by the invention has excellent flame retardant performance, does not contain halogen components, does not emit toxic smoke when burning, avoids secondary disasters, and has high safety.

The invention discloses a cabinet type data center operation environment monitoring system and method. The system comprises a cabinet body, wherein the cabinet body is internally provided with a hostchamber and a cooling chamber, wherein the host chamber is sequentially provided with a host partition cabinet, a monitoring partition cabinet, a power distribution partition cabinet, a main power supply partition cabinet and a standby electric partition cabinet from the top to the bottom; a server host is arranged in the host partition cabinet; a monitoring module is arranged in the monitoring partition cabinet and is electrically connected with the server host; a power distribution module is arranged in the power distribution partition cabinet and is electrically connected with the server host; a main battery pack is arranged in the main power supply partition cabinet and is electrically connected with the power distribution module; a standby battery pack is arranged in the standby electric isolation cabinet and is electrically connected with the power distribution module; cooling equipment and fire extinguishing equipment are arranged in the cooling chamber, and the control ends ofthe cooling equipment and the fire extinguishing equipment are electrically connected with the control end of the server host. According to the scheme, the cooling device is arranged in the cabinet body, hot air in the cabinet is taken away for cooling through air flowing of the cooling device, and a good cooling effect is achieved while energy consumption is reduced.

The invention discloses a monitoring point arrangement method for underground space gas explosion risk prevention and control. An effective monitoring point laying strategy is constructed in combination with the total system risk value, the investment reasonability of monitoring point laying and the system risk control rate; the maximum benefit value can be obtained through optimization, fund investment can be saved, the maximum detection efficiency can be obtained, the gas pipeline leakage situation can be found in time, secondary disasters caused by gas leakage are avoided, and the method plays an important role in guaranteeing safe operation of urban gas. On the basis of a traditional risk calculation method, the sensor prediction effect is originally introduced into explosion risk calculation of the adjacent underground spaces, and all the adjacent underground spaces within the gas pipeline leakage influence range serve as a whole to calculate the total risk value of the system.

The invention discloses a method for determining the installation position of a mine disaster blocking emergency refuge device. The installation position of the mine disaster blocking emergency refuge device is obtained through calculation according to the relation between the distance between a gas blasting source and a protected object and the air shock wave overpressure value, and the rationality of the installation position of the mine disaster blocking emergency refuge device is verified through gas blasting flame propagation time, personnel evacuating time and the starting time of the mine disaster blocking emergency refuge device; aiming at a mine flooding accident caused by mine water inrush, the installation position of the mine disaster blocking emergency refuge device for preventing mine water inrush is determined through water level upward rising time, water flow downward pervasion time, the personnel evacuating time and the starting time of the mine disaster blocking emergency refuge device; the reference for determining the installation position of the mine disaster blocking emergency refuge device is characterized in that the personnel evacuating time Tr is longer than the starting time Tz of a photoelectric induction or impact sensor and the mine disaster blocking emergency refuge device, and the starting time Tz of the photoelectric induction or impact sensor and the mine disaster blocking emergency refuge device is not shorter than the maximum value of the flame propagation time TB and the water level upward rising time Ts in the gas blasting process.