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　　二、Survey、Design、The construction unit is not qualified or exceeds the qualification level to 188bet Live Casino undertake the contract、Subcontract、Illegal subcontracting project。

　　三、The main person in charge of the construction unit、Project leader、The person in charge of safety management has not obtained the safety production assessment certificate to engage in relevant work；Railway construction hoisting machinery、Welding and thermal cutting operators do not have the special operator qualification certificate to work on the job。

　　四、Failure to prepare and approve special construction plans for sub-projects with greater risk as required；Failure to organize expert demonstrations as required、Review；Major changes to the construction plan have not been re-implemented for approval。

　　五、Welding in the tunnel、Failure to perform work permit approval procedures as required for hot operations such as thermal cutting and arrange for dedicated supervision。

　　Six、The mining method construction did not carry out advance geological forecast according to the specifications and plan requirements、Monitoring Measurement；The advanced geological forecast conclusion is inconsistent with the design situation，Abnormal 188bet app download monitoring and measurement data，No action taken；When the survey design is seriously inconsistent with the actual geological conditions，No design changes have been made。

　　seven、Construction continues when there is no corresponding measures or the control measures fail when there is water on the working surface of the mining method construction；Reverse slope tunnel、The pumping and drainage capacity of auxiliary tunnels such as inclined shafts is less than the designed water inflow，Emergency backup power is not configured、Pumping and drainage equipment。

　　eight、Changing the excavation method without authorization；The length of the inverted arch excavation does not meet the program requirements、Not closed in time to form a loop，Inverted arch、Initial support、The safety step distance between the secondary lining and the tunnel face exceeds the standard；Failed to deal with the void behind the arch in time、The problem of the hollowing of the second lining vault。

　　九、Ventilation facilities are not installed according to regulations during mine construction；During the construction process, 188bet online live casino monitoring and alarm devices were not configured as required to detect toxic and harmful gases in the cave、Monitoring；Risk operation even after the concentration of toxic and harmful gases reaches or exceeds the limit。

　　十、High gas tunnels or gas outburst tunnels constructed by the mining method are not exposed to coal outbursts according to the design or plan，Each excavation face is not equipped with independent ventilation。

　　Eleven、Shield construction is still risky due to shield tail seal failure；Shield boring machine orTBMThe tunnel boring machine is jammed or the tunneling parameters、Excavation load、Sudden and abnormal changes in excavation speed，Failure to take timely measures in accordance with relevant regulations。

　　12. The shield tunnel construction did not open the warehouse under pressure for inspection and tool change as required.

　　13. There is no blasting design or the blasting design is not followed.

　　Fourteen、No unified blasting signal and blasting command，No comprehensive clearance confirmation before detonation；The distance between the excavation work surface or main tunnel at both ends before the 188bet login tunnel is penetrated and the working surface of the adjacent auxiliary channel is less than5Double hole diameter，No unified command and management；The distance between the working surfaces before the penetration is close3Double hole diameter，No measures were taken to stop the work at one end of the excavation and evacuate personnel and machinery at the other end；No inspection and confirmation after blasting，Or start construction immediately without risk elimination。

　　Fifteen、Explosive equipment is not stored according to regulations、Receive、Withdrawal，Private processing、Destroy civil explosive equipment；Use non-specialized vehicles to transport civilian explosives or mixed transport of human drugs。

　　Sixteen、Construction Station、Mixing station、Temporary facilities such as steel bar (frame) processing plants are set up on the landslide、Mudslide、Flood、Avalanche and other dangerous areas without disaster assessment and effective measures taken。

　　Seventeen、On-site transportation vehicles are not regularly inspected，Overweight transportation or use of freight vehicles to transport people。

　　Eighteen、Long、Extra long and high-risk tunnels are not equipped with emergency communication and alarm systems，The working surface is not equipped with an alarm、Communication device。

　　Nineteen、Adjacent important buildings that may be damaged due to construction、Structures and underground pipelines, etc.，No special protective measures were taken。

　　Twenty、No explosion-proof electrical appliances and explosion-proof operating machinery are used in tunnel engineering sites with high gas or gas outbursts；The lining and sealing of the auxiliary tunnel of the gas tunnel were not constructed according to the design，The construction working surface is not equipped with ventilation facilities as required、Perform gas detection and monitoring。

　　Twenty-one、The high and steep slope of the tunnel entrance was not excavated and reinforced according to the design requirements，The deformation of the side slope is not monitored as required or the deformation exceeds the specified value；Construction of karst and water-rich broken surrounding rock sections，Failure to complete pressure relief or pre-reinforcement measures as designed before excavation。

　　Twenty-two、Mud bursts on the working surface、Gushing water、Gushing Sand、Partial collapse，The supporting structure is distorted or cracked，There is an increasing trend of people not being evacuated in time；After a geological disaster occurred in a complex geological tunnel that affected the project quality and construction safety，No design enhancement measures were taken。

　　Twenty-three、Diesel locomotive、Self-rotating equipment、No toxic and hazardous gas 188bet online live casino monitoring and alarm devices are installed on diesel power generation equipment operating in a long tunnel，Failure to provide adequate respiratory masks and other emergency equipment as required。