First: there is no need
Looking at the archaeology in recent years, it is not difficult to find that modern archaeology is mainly based on protective and preventive excavations, such as ancient tombs that have been patronized by tomb robbers, ancient tombs that have been accidentally destroyed due to construction, ancient tombs exposed due to geological disasters, and ancient tombs that may be destroyed for various reasons, while there are very few ancient tombs that need to be actively excavated due to archaeology.
Taking the archaeological excavation of Sanxingdui as an example, the first discovery and excavation of Sanxingdui can be traced back to the early 1930s of the last century, as early as 1929, it was discovered by accident because of a pit of jade tools, and in 1934, Ge Weihan, director of the West China University Museum, and Assistant Lin Mingjun formed an archaeological team to excavate the area for ten days. Since then, since the 1950s, excavations of Sanxingdui have been carried out intermittently, and the excavation of Sanxingdui is just a continuation of previous excavations.
Another example is the excavation of the Terracotta Warriors and Horses Pit of Qin Shi Huang, which was originally an unconscious discovery, originating from a well drilling by villagers in 1974, and in mid-July of the same year, an archaeological excavation team jointly composed of the Shaanxi Provincial Museum, the Cultural Management Commission and the Lintong County Cultural Center entered the Qin Figurine Pit site and began the excavation of the Terracotta Warriors and Horses of Qin Shi Huang.
As for the Mausoleum of Qin Shi Huang, it is still well preserved, because of the importance of its mausoleum, no one dares to go to its surroundings for development, coupled with the high concentration of mercury content in the Mausoleum of Qin Shi Huang, there is also no tomb robber who dares to patronize, so there is no need for protective and preventive excavation.
Second: it's too difficult
This is also an important factor affecting the excavation of the Mausoleum of the First Emperor of Qin, and the current difficulty of excavation is mainly reflected in two aspects, one is the technical difficulty, and the other is that the amount of engineering is too large.
In terms of technology, it is precisely because the influence of the Mausoleum of the First Qin Emperor is too great, if there is not enough technical support, it is likely to lead to damage to the cultural relics in it, especially the cultural relics of extremely high value such as bamboo and shushu, but also extremely easy to be destroyed, even if there is a slight damage, it will be an irreparable loss.
In terms of engineering volume, from the current exploration results, the area of the Qin Shi Huang Mausoleum alone is extremely exaggerated, not to mention that there are many other funerary pits around the imperial tomb, and it should be known that only the Terracotta Warriors and Horses Pit is 1.5 kilometers away from the main mausoleum. It is conceivable that this amount of engineering is huge, even if the modern has a lot of advanced equipment, but the archaeological work is extremely meticulous work, large machinery can not operate at all, and the amount of manpower engineering alone is too huge.
Even the excavation of the Terracotta Warriors and Horses Pit is gradually slowing down at present, and under the premise of not having sufficient technical support and manpower and material support, the current excavation of the Mausoleum of the First Qin Emperor is obviously unrealistic.
In summary, even if it is known that the archaeological value of the mausoleum of Qin Shi Huang is extremely high, the state will not agree to the excavation in the short term. What's more, the current state policy for the imperial tomb is "not active", even if the future conditions are mature, manpower and material resources are sufficient, under the premise that the Qin Shi Huang Mausoleum has not been destroyed, it is unlikely to be excavated.